Experimental study on AE characteristics of three-point-bending concrete beams

• Published in: Cement and concrete research Vol. 34; no. 3; pp. 391 - 397
• Main Authors: Chen, Bing, Liu, Juanyu
• Format: Journal Article
• Language: English
• Published: New York, NY Elsevier Ltd 01.03.2004; Elsevier Science
• Subjects: Acoustic emission; AE; Applied sciences; BENDING; BRITTLENESS; Buildings. Public works; Concrete; CONCRETES; Concretes. Mortars. Grouts; EMISSION; Exact sciences and technology; FRACTURES; General (composition, classification, performance, standards, patents, etc.); Materials; MATERIALS SCIENCE; Microcracking; NOTCHES; Acoustic emission; Microcracking; Concrete; Brittleness; Characteristics; Failure analysis; Notch; Experimental study; (AE); Concrete; Microcracking; Brittleness; Beam(mechanics); Bending test
• ISSN: 0008-8846; 1873-3948
• DOI: 10.1016/j.cemconres.2003.08.021

In this research, acoustic emission (AE) characteristics of three-point-bending concrete beams were investigated during the entire loading period. It was found that the relative notch depth significantly influenced AE characteristics. The occurrence of AE events decreased greatly with an increase of the relative notch depth. The influences of different fibers in concrete on AE characteristics were investigated as well. The experimental results indicated that the Weibull function can be used to describe quantitatively the influences of the relative notch depth and fibers on AE characteristics, fracture characteristics, and brittleness of concrete. The two parameters, θ and m, of the Weibull function depended on the geometry of the concrete specimens and the brittleness of concrete, respectively.